HOUSTON — Marcus & Millichap has completed the sale of Portofino Apartments, a 60-unit multifamily property located at 140 Surf Ct. in Houston. The vacant property totals 44,840 square feet and was constructed in 1963. Robert Su of Marcus & Millichap’s Houston office represented the seller, a financial institution. Su also represented the buyer, a private investor. The acquisition price was not disclosed.